660243444 has 48 divisors (see below), whose sum is σ = 1796592000. Its totient is φ = 188639808.

The previous prime is 660243439. The next prime is 660243449. The reversal of 660243444 is 444342066.

It is an interprime number because it is at equal distance from previous prime (660243439) and next prime (660243449).

It is a super-2 number, since 2×660243444² = 871842810689962272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660243449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76089 + ... + 84320.

It is an arithmetic number, because the mean of its divisors is an integer number (37429000).

Almost surely, 2^660243444 is an apocalyptic number.

It is an amenable number.

660243444 is an abundant number, since it is smaller than the sum of its proper divisors (1136348556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660243444 is a wasteful number, since it uses less digits than its factorization.

660243444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160437 (or 160421 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 33.

The square root of 660243444 is about 25695.2027429246. The cubic root of 660243444 is about 870.7658047731.

The spelling of 660243444 in words is "six hundred sixty million, two hundred forty-three thousand, four hundred forty-four".